Hi all. I was hoping to find some ideas/help in regards to setting up a proper overflow/return in my tank as well as maybe seeing some ideas for a diy ATO resevoir and set up! There will be a pic uploaded with this but as you'll see in it, my tank was used as a certain loop in a fewshwater system, and has 6 bottom drilled holes. Any ideas in regards to getting the best skimming and whether to plug some holes etc would be super helpful. Also, like I said if I could get some input regarding a diy ATO resevoir to maybe cut down on how often I need to prep water would be awesome as well.